拉曼光谱参数在不同成熟度煤显微组分分析中的应用

Application of laser Raman spectroscopic parameters of coal maceral analysis with different maturity

高志伟 张聪 李美俊 方镕慧 腾格尔 肖洪 朱志立

GAO Zhiwei ZHANG Cong LI Meijun FANG Ronghui BORJIGIN Tenger XIAO Hong ZHU Zhili

中国石油大学(北京) 油气资源与勘探国家重点实验室, 北京 102249 中国石油大学(北京) 地球科学学院, 北京 102249 中国地质调查局 油气资源调查中心, 北京 100083 中国地质调查局 非常规油气地质重点实验室, 北京 100083 中国石化 石油勘探开发研究院 无锡石油地质研究所, 江苏 无锡 214126

State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China Oil and Gas Survey, China Geological Survey, Beijing 100083, China Key Laboratory of Unconventional Oil & Gas Geology Center, China Geological Survey, Beijing 100083, China Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

激光拉曼光谱在显微组分分析中已显示出良好的应用前景。对不同成熟度(Ro为0.49%~1.88%)煤样中的不同显微组分(镜质体、半丝质体、粗粒体)进行拉曼光谱分析后发现，不同显微组分的拉曼光谱参数存在明显差异，这在煤显微组分分析中有以下应用：(1)利用拉曼光谱参数组合可区分煤样中的显微组分，该研究中可区分的参数组合达21种，它们均可作为区分此类显微组分的参考标准；(2)可区分煤样中显微组分的参数组合中最关键的参数是峰位移WD1，使用时需考虑热演化程度影响，这可能对下古生界处于高—过成熟阶段且光学性质逐渐趋同的显微组分差异研究提供帮助。因此拉曼光谱参数可作为显微组分分析的一种有效方法。

Laser Raman spectroscopy has shown a good application prospect for maceral analysis. Raman spectroscopic analysis of different macerals (e.g., vitrinite, semifusinite and macrinite) in coal samples with different maturity (%Ro=0.49%-1.88%) was carried out in this study, and results show that three macerals have significantly different Raman spectrum parameters, which have the following implications for the macerals analysis of coal: (1) Macerals in coal samples can be distinguished by the combination of Raman spectrum parameters. There are 21 kinds of parameter combinations discussed in this study, which can be used as reference standard for the classification of these organic macerals; (2) Peak displacement (WD1) is the most critical parameter to distinguish the macerals of coal samples. The influence of thermal evolution should be considered, which may assistant for the study of maceral differences in the Lower Paleozoic which are in the high to over mature stage with optical properties gradually converging. Therefore, Raman spectrum parameters can be used as an effective method for maceral analysis.

全国地质调查评价专项项目“油气地质调查钻井岩心保存参数采集与应用” DD20201114

https://doi.org/10.11781/sysydz202204705